When I say the word "goatee", what springs to your mind? The mirror universe Mr. Spock from Star Trek? Ming the Merciless from Flash Gordon? Perhaps you are thinking of Captain Jack Sparrow.
You would be incorrect for those beards are not goatees, though the modern media and contemporary colloquialism keeps calling them that. No, having a beard and mustache around your mouth not connected to sideburns is not a goatee.
This, my friends, is a goatee. A quintessential example of "a beard formed by hair grown only on the chin area." Add a mustache to the equation and, by definition, it is no longer a goatee.
So, now that today's lesson is over and you know what actually constitutes goatee, when someone says the word you will not embarass yourself by thinking of Tony Stark, you will be thinking of Norville Rogers.